Installed my custom designed turbo. All upgraded the rod bolts to ARP to help strengthen the bottom end. Now running RPM Stage 3, used to run Manic Stage 3.

The car is a completely different beast. When I had the 47mm turbo, the top end was amazing but the power didn't really kick in until about 4k RPMs. This turbo hits full boost around 2500 RPMs and just moves like a bat out of the batcave... at 3k RPMs. Totally different beast in the best ways possible, but with very similar top end as the 47mm. To be completely honest, I wasn't totally sure what to expect so everything so far has been positive.

This is a one-off turbo, I designed it all myself based off the stock turbo platform. Compressor is unique, it's really capturing what I was hoping to get from it. I was a little worried about the weight at first, but it's performing better than expected. The turbine isn't too unique, but isn't commonly used on the K03/4 hybrids. The combo of the compressor and turbine really work well together.

Cold Start:




Great Gas Milage:




Testing out how the car pulls...

 

So you made it yourself, that's amazing, how about dyno!

 

talk me through this turbo....

 

It's just a stock turbo with upgraded parts running a (49 trim) 43mm compressor, and a 44.4mm x 50mm turbine wheel.

 

where did you source those parts? and did you build that turbo?

 

Very interested

 

i found this on ebay from the turbolabs: https://www.ebay.com/itm/Mini-Cooper...cAAOSwEC5dTZoJ

 

That's a 50mm compressor, way bigger than what most people will be able to maximize.


Tiger2011 runs a similar version and his dyno shows that things barely start moving around 4k RPMs, but that's JCW GP (way lighter) and FWD, aka less drivetrain loss.

Plus he has a JCW engine as a base and needed meth injection, forged parts, etc.


Lag will be pretty insane on the ALL4, probably hit full torque 4500 rpms or so, if we'd be so lucky. Top end wise, it would fill those needs.

I ran a 47mm turbo and that thing had too much lag to be a fun well rounded car. Nothing really happened until about 4k RPMs.

Based off that experience that's why I decided to go to a lower trim (faster spooling) and smaller compressor inducer (also helps with faster spool) to maximize drivability.
The compressor in the Mk. 43 is about as capable as the 47mm, maybe even the 50mm, as a far as HP potential. The trade off is that the exducer is pretty large, so the compressor is as heavy as a 50mm compressor.


I actually bought the 50mm one a few years ago to test out, did a bunch research and decided it wouldn't be a good fit due to the massive lag in the lower to mid RPMs.

I still have that 50mm turbo (compressor housing, compressor and turbine wheel), if you're looking to buy one I can sell you the one I have on hand. Still brand new, never installed on a car.

 

nah I don't plan on getting my r60 to that level, although if it were to get stroked, im sure that 50mm would be great. I would definently like to see where you got your stuff from. I think its very odd that we have such a small turbo. I can hear my bypass going in reverse under 2k rpm. having 3k full boost would be fine to me, since its the 6spd and I dnt really drive it under 2k anyways

 

A little off topic...

If there are any military service veterans on NAM, we'd love to recognize you with a neat little "flag" on your user profile. See mine above for an example.

If you would like to be recognized, please PM me directly with the following:

1. Military branch you served with
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